Combined steam-generator and steam-superheater.



No. 772,315. v IPA'I'EIITlSiD OCT. 11, 1904 J. MILNE.

COMBINED STEAM GENERATOR AND STEAM'SUPERHEA TER.

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J. MILNB. COMBINED STEAM GENERATOR AND STEAM SUPERHBATBR.

APPLICATION FILED APR. 18, 1903. v

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JVM-QWM/L e/ME W UNITE {STATES JOHN MILNE, OF BROOKLYN, NEW YORK,ASSIGNOR TO MI LNE BOILER OO.,

Patented October 11, 1904.

PATENT OFFICE.

A CORPORATION OF NEW YORK.

COMBINED STEAM-GENERATOR AND STEAM-SUPERHEATER.

SPECIFICATION forming p of Letters Patent N 772,315, dated. October 11,1904..

Application filed April 18, 1903.

T0 aZZ whom it may concern:

Be it known that I, JOHN MILNE, a citizen of the United States ofAmerica, and a resident of the borough of Brooklyn, county of Kings,State of New Yorlghave invented certain new and useful Improvements in aCombined Steam-Generator and Steam-Superheater, of which the followingis a specification.

This invention relates to steam-generating apparatus, and has for itsobject the production of a steam generator or boiler which has connectedtherewith a steam-superheater, the latter being subjected to the hotgases and products of combustion.

Figure 1 represents a partial vertical section of my invention as on theline 00 m of Fig. 3. Fig. 2 shows a plan view of a fragmentary portionof Fig. 1. Fig. 3 is a partial front view and. sections of Fig. 1 on thelines w, x and 00 The invention is represented to consist of the upperdrum A, from which extend steamgenerating tubes B, the latter connectingwith a lower drum C. Baffle-plates B extend upwardly from the lowerdrum, and baflie-plates B extend downwardly from the upper drum A. Tubesor pipes D extend from the lower drum O and are capped by a manifold orheader E, which latter is independent of and not connected with the drumA, its interior being isolated therefrom. Hand-hole caps E are securedin the header E to allow the cleaning of the tubes D and their removalfor the insertion of new tubes. The said tubes D, with the header E,constitute an economizer.

To secure a superheater, two independent manifolds or headers F F areconnected with tubes or pipes F and an outlet is provided in the saidtop header at F. The upper header F has its interior isolated from theupper drum, and the lower header F is connected with the lower drum O bymeans of piping H, in which latter there is fitted the valve H, the saidpiping being used to flood the superheater.

Steam-outlet pipes are shown at I, having the safety-valves I andhorizontal connecting Serial No. 153,151. (No model.)

branch pipes 1 with the valves 1 and the T 1*. From the horizontal pipesI there extend the vertical pipes J, having the valves J and connectingwith the header F.

The drums A and O, with their tubes B, the header E, with its tubes D,and the tubes F, with their headers F and F, are inclosed by the rearwall K, front wall G, side walls L, top covering M, and bottom N,forminga chamber for the'steam-generating apparatus.

The furnace is shown at O, with its grates P, furnace-door R, andash-pit door R. The crown S of the furnace is connected with the wallS", that supports the header F and forms a portion of the front of theboiler. An iron frontT is represented with movable panels T.

Buck-staves U are located at the rear of the generator, and buck-stavesU are attached at the sides.

V isan outlet for the connection with the chimney, and cleaning-doors VV are located in the side Walls of the boiler. A blowoif W is connectedwith the lower drum C.

When using my steam-generating apparatus, the gases and products ofcombustion on leaving the furnaceO pass around and about the portion ofthe steam-generating tubes B in front of the baffle-plate B and alsopass around and about the tubes F of the steamsuperheater. They ascendto the drum A and then descend, circulating about the tubes between thebaffle-plates B and B and from thence pass upwardly around and about thetubes B back of the baflie-plates B and also about the tubes D of theeconomizer, after which they enter the chimney through the opening V.superheated steam is obtained at the outlet F and should it be desirednot to use the steam-superheater the valves J are closed and the valves1 opened, when the steam can be taken from the outlet of. the T-I, andat the same time the valve h in the piping H is kept open to flood thesuperheater tubes or pipes F to protect them from the hot gases ofcombustion.

The construction is such that, if desirable, the entire superheater canbe removed after the valves J are closed. When the steam-superheater isused,

the valves 1 are closed, and it is evident that, if desirable, steam canbe supplied both from the T I and from the outlet F Having described myinvention, 1 clainn 1. In a steam-superheater the combination of pipingextending from a steam-supply, a branch pipe extending from said piping,a a valve in said branch pipe, a valve in the piping beyond itsconnection with the branch pipe, a header connected with the end of thepiping, steam-superheating tubes extending from the header, piping forwater connected to the header, a valve in the latter piping, and anindependent header capping the steamsuperheating tubes.

2. In a steam-generating apparatus and steam-superheater, thecombination of an upper and a lower drum, a chamber inclosing the saiddrums, tubes connecting the drums,

JOHN MILNE.

Witnesses NEWTON HARRISON, SAMUEL BACHMAN.

